baber/WOPTO huggingface dataset:
Patent GB-787424-A (GB)
Title: Improvements relating to loudspeakers and the like
IPC: H04R7/12
Filed: 1953-04-13
Abstract: 787,424. Making electroacoustic diaphragms. WHITELEY ELECTRICAL RADIO CO., Ltd., and WHITELEY, A. H. April 12, 1954 [April 13, 1953], No. 10037/53. Class 87(2). [Also in Group XXXIX] A diaphragm for an electroacoustic device is made by a process comprising the steps of (i) lightly impregnating a sheet of open woven linen or cotton cambric with a hardenable synthetic resin. (ii) Forming the sheet to the shape of the diaphragm required, as shown in Fig. 1, in a heated press, the resin being cured to the point where the sheet has acquired a substantial degree of permanent stiffness. (iii) Passing through the permeable fabric, by suction or pressure, a suspension of fibres in water, so depositing a layer of fibrous pulp. The fibres are beaten to a small size and include those of cotton, sisal, wood pulp and cellulose. Different materials may be deposited at different parts of the conical axes 10, to break up resonances which may tend to occur, or the thickness of the deposit may be varied locally for the same purpose, or holes can be cut in the cambric if desired. (iv) Applying heat and pressure to the fibre with the wet deposit in a press similar to that used in step (ii) but with at least one face covered with metal gauze to allow steam to escape. (v) Allowing the deposit to dry and coating the deposited area with a cement to bond the fibres of the deposit to those of the cambric. The cement can be of the solvent type and/or of a type including a .thermoplastic or thermosetting material, a cellulose stoving enamel being suitable. (vi) Allowing the solvent to evaporate and again placing the diaphragm in a heated press. Alternatively, but less desirably, the cement may be included in the liquid suspension to shorten the process. The surround 11 is coated with material to seal the interstices in the cambric, e.g. rubber solution, to prevent sound radiation. To assemble the diaphragm in a loudspeaker, Fig. 5, the disc 14 in the centre of the diaphragm is pushed out and a coil support 17, with coil 18, is attached to it. A centring spider 19, which may be made in the same way as the diaphragm, is cemented to the assembly, which is then mounted in a housing 20 with the coil in the air gap of a magnetic structure 21.
Patent GB-308839-A (GB)
Title: Improved method of and apparatus for preparing stereoscopic pictures
IPC: G03B35/00
Filed: 1929-03-28
Abstract: 308,839. Le Barbier, E. P. L. March 30, 1928, [Convention date]. Stereoscopic kinematography.-The points of view of objectives used to make stereoscopic pairs of images which are subsequently projected on to a screen are spaced apart a. distance which bears the same ratio to the normal interpupillary distance as the dimensions of the image subsequently projected do to the corresponding dimensions of the actual subject. In carrying out the invention, two cameras and two projectors may be used, or a single camera carrying a double-width film and a projector projecting images in superposition. The Figure shows diagrammatically in plan apparatus for producing simultaneously pairs of images arranged in sequence on a single width film. Horizontal telescopic arms g carry reflecting prisms g<1> and mirrors g<2> directing rays from the subject to superposed lenses i which produce images on the film. The arms are simultaneously rotatable, and means are described in the Specification for this purpose and for rotating the mirrors g<2> at half the angular speed of the arms. The images may be projected at double the speed at which they are taken. The Specification as open to inspection under Sect. 91 (3) (a) comprises also a modification, in which the arms are stationary, and rotatable mirrors replace the prisms g<1>. This subjectmatter does not appear in the Specification -as accepted.
Patent GB-696315-A (GB)
Title: Improvements relating to printing, duplicating and like machines and methods of operating the same
IPC: B41L7/08
Filed: 1951-04-30
Abstract: <PICT:0696315/III/1> <PICT:0696315/III/2> <PICT:0696315/III/3> A printing, manifold or spirit duplicating machine of the kind in which the colour is transferred from a master sheet on a printing drum operated by a handle to a damped copy sheet is provided with control means for the supply of liquid which is dependent on the movement of the handle in such a manner that on starting to rotate the handle the flow of moistening liquid begins and ceases on releasing the handle. The handle 16, Fig. 3, is secured by a screw 17 to a sleeve 12 having an oblique straight or curved slot 13 engaging a pin 15 in the extended boss 14 of the driving <PICT:0696315/III/4> pinion 11 for the drum.  The handle and pinion are connected by a torsion spring 18.  When the handle is rotated, the pin-and-slot connection causes it to move axially inwards, thereby moving axially a pressure bolt 10 to swing a lever 4 to cause the liquid to be supplied.  After about 60 degrees rotation, the tension of the spring causes the handle to rotate the pinion.  When the handle is stopped rotating, the spring causes it to move back through 60 degrees to shut off the liquid supply.  The lever 4, Figs. 1 and 3, when actuated against a spring 9, allows the liquid container 1 to be lowered into contact with a suction roller 25. The container 1, Figs. 1 and 5, is rotatable, and when out of contact with the roller 25 is kept in a position in which the liquid cannot flow out, by means of a tension spring 22 attached to a fixed point and to a link 21, rotatable on the container and connected by a compression spring 23 with a rocker 20 secured to the container.  In another form, Fig. 7, actuation of the lever 4 moves a cam 31 into the path of a roller 28, so that on each revolution of the drum 30 a valve 26 is opened to allow the liquid to flow out of a stationary container 24.  Alternatively, the roller 28 can actuate a valve which allows air to enter the container so that liquid can flow out.
Patent GB-331547-A (GB)
Title: Improvements in or relating to motor vehicles
IPC: B62D61/08
Filed: 1929-04-02
Abstract: 331,547. Newman, Ltd., S. A., and Newman, S. A. April 2, 1929. Springs, arrangement of; axles. - In a light threewheeled motor vehicle for the transport of goods of the type comprising a front frame b of the motor-bicycle type, which supports the engine a and a steering-column connected to a single front wheel f, and which is connected, as by tierod e, c to a body-supporting frame d mounted on a pair of rear road wheels driven from the engine, the body is mounted on its supporting frame by two pairs of springs, and the connections between the body and the rear springs are made by pivoted brackets, while the connections between the body and the front springs are detachable, so that the body may be tilted rearwardly to facilitate access to the engine, transmission, &c. The frame a, which may be constructed of longitudinal and transverse channel-sectioned members, is suspended from the ends of the casing h of the rear axle by brackets g<3>, which are adjustable longitudinally of the frame by means of screw-and-nut mechanism j, j<1>, the brackets being provided with guide slots engaging fixed screw studs carrying clamping-nuts. The body g, which has a front canopy g' and weather screen g<2>, is supported on a pair of front coil springs k<3> and a pair of rear leaf springs k, and is adapted to be released from its bolted connection with the front springs k<3> and tilted back about its connections k<2> with the rear springs k.
Patent GB-640919-A (GB)
Title: Oscillation generator
IPC: H03L7/20
Filed: 1947-04-17
Abstract: 640,919. Automatic frequency control systems. BENDIX AVIATION CORPORATION. April 17, 1947, No. 10281. Convention date, May 31, 1946. [Class 38 (iv)] Relates to automatic frequency control systems of the kind in which discrete harmonics derived at 11 from the output of a standard crystal oscillator 10 are mixed at 13 with the output of a tunable oscillator 12, the resulting beats being applied to a tunable discriminator 14 which provides a correcting voltage for a frequency controller 15 associated with the oscillator 12. The invention consists in operating the harmonic selector 17 simultaneously with the tuning adjustment of the circuit 18 of the oscillator 12 by a linkage 19. The discriminator tuning should cover a band of frequencies at least as wide as the fundamental frequency of the standard source 10. The frequency controller 15 may be a reactance valve. The system as a whole provides accurate control over a wide and continuous band of radio frequencies. Specification 581,138 is referred to.
Patent GB-904247-A (GB)
Title: Improvements in or relating to electric circuit arrangements incorporating semiconductor controlled rectifiers
Inventor: JACKETS ALBERT EDMUND
IPC: H02M7/155
Filed: 1960-03-23
Abstract: 904,247. Rectifying. GENERAL ELECTRIC CO. Ltd. March 16, 1961 [March 23, 1960], No. 10316/60. Class 38 (2). In an arrangement for supplying D.C. to a load (e.g. a motor winding) from an A.C. source 5 through at least two series connected silicon controlled rectifiers 1, 2, firing pulses whose time of arrival is variable are derived from a circuit 13 . . . 20, as disclosed in Specification 904,246, and applied to the gate of a rectifier 1, the conduction of this rectifier providing the firing pulses for rectifier 2. A pair of equal resistors 7, 8 are connected to equalize the voltage across the rectifiers in the quiescent state. To protect the rectifiers against voltage surges occurring in the operation of the load, a pair of capacitors 11, 12 are connected across them. Also to this end the circuit includes a resistor 9 connected between the common junction of the resistors 7, 8 and capacitors 11, 12 and the gate of rectifier 2. When rectifier 1 fires, current, partly from the source 5 and partly from the capacitor 11, flows through the gate of rectifier 2 and is limited to a safe level by resistor 9. A fired diode 21 protects the rectifier 2 by limiting gate-cathode voltage. To prevent the firing of rectifier 2 by leakage current flowing through the rectifier 1 during the quiescent period of the positive half-cycle, a resistor 10 is connected across the cathode gate circuit of rectifier 2. In an alternative arrangement the capacitor 12 is dispensed with. A string of rectifiers may be fired by a cascade sequence.
Patent GB-615990-A (GB)
Title: Improvements in fire-bridges for boiler furnaces
IPC: F23M3/00
Filed: 1946-04-04
Abstract: 615,990. Firebridges. RANKIN & BLACKMORE, Ltd., and FERRIER, H. April 4, 1946, No. 10384. [Class 51 (i)] In a firebridge for boiler furnaces, which is built up of curved bars arranged side by side so that air spaces are formed between adjacent bars, the bars 10 are provided with laterally projecting flanges 20, 21, 22 forming front and rear compartments supplied with air through openings 27, 28 in a support 11. Interlocking projections between adjacent bars provide openings 26 for the front chamber and openings 31 and other narrow slots, Fig. 2 (not shown) above the rear chamber. Special interlocking bars, Fig. 3 (not shown) are interposed between the bars 10 and a shield 36 protects the rear of the bridge.
Patent GB-1173798-A (GB)
Title: Improvements in Fittings for Hoses in the Manner of Attachment Thereof to Hoses
Inventor: DUFFIELD FREDERICK RUSSELL
IPC: F16L33/01
Filed: 1967-03-06
Abstract: 1,173,798. Hose end fittings. F. R. DUFFIELD. 6 March, 1967, No. 10427/67. Heading F2G. A hose end fitting 10 comprises a stem having a threaded portion 12 and a tapered portion which is adapted to enter the end of a hose 15, and a body portion 19 adapted to be screwed onto the threaded portion 12 of the stem and provided with ridges 20 on its interior surface so as to grip the material of the hose end on the body portion 19 being swaged about the hose end. The body portion 19 is also provided with a skirt portion 23 beyond the portion having the ridges, the skirt portion 23 having an internal ridge 22 at its outer edge. The stem may be provided with a further threaded portion 11 for connection to another member, e.g. a nozzle, and a nut 13. The body portion or ferrule 19 is further provided with annular grooves 21 to facilitate the swaging operation. The body portion or ferrule may have a gradually tapering cross-section. In affixing the hose end fitting to the hose 15 the outer covering of the hose, which is resilient, is removed and a wire reinforcement 18 is gripped by the ridges which may be teeth or buttresses. Part of the threaded portion 12 of the stem may also come into contact with the reinforcement 18.
Patent GB-802652-A (GB)
Title: Improvements in or relating to crimping tools
IPC: H01R43/042
Filed: 1954-12-23
Abstract: 802,652. Crimping tools. AMP, Inc. Dec. 23, 1954 [Sept. 20, 1954], No. 10437/57. Divided out of 802,651. Addition to 750,047. Class 61. A die operated tool for crimping electrical connectors and terminals to conductors, comprises means 63, 64, for locating the connector or terminal in the tool, the said means comprising an elongated bar-shaped element 66 positioned alongside the die sets 35, 36, and extending approximately perpendicular to the direction of relative movement between the dies, and to the longitudinal axis of a connector or terminal inserted between the dies. As shown, each locator is slotted at 67, and a spring 72 extends between a peg 72 and the bottom of the slot to exert a downward force on the locator. The locator is raised against the action of the spring when inserting a connector or terminal. Specifications 801,436, 801,437 and 802,653 are referred to.
Patent GB-729526-A (GB)
Title: Improved flushing device operating mechanism
IPC: E03D1/16
Filed: 1953-04-20
Abstract: 729,526. Water-waste-preventing cisterns. MARSHALL, P. E. Jan. 20, 1954 [April 20, 1953], No. 10679/53. Class 26. A water-waste-preventing cistern operated by the release of air pressure built up during the previous cycle comprises two opposing floats A and B pivoted at E, the flooding and emptying of the float A controlling the opening and closing of the outlet. A. flexible pipe is attached to the vent G, the release of pressure by a valve at its other end allowing the float A to fill through the hole F. The float A empties when the water level in the cistern has fallen sufficiently, and a movable weight D is provided for adjusting the balance of the floats.
Patent GB-117674-A (GB)
Title: Improvements in or relating to Coin-freed Delivery Apparatus.
Inventor: COX ROBERT MILNES
IPC: G07F11/34
Filed: 1918-01-22
Abstract: 117,674. Cox, R. M. Jan. 22, 1918. Delivery of articles stored in rows.-The articles such as tins of boot polish are stored on inclined shelves c, the lowest article d being normally retained by a projection e on a counterweighted coin lever f. The inserted coin or coins strike the bifurcated arm f<1> of the lever f, thereby raising the projection e permitting the tin d to fall to the tray p, and simultaneously turning a counterweighted lever i into position to obstruct the passage of the following tin d<1>. Two sets of shelves c, c' are disposed on opposite sides of a partition b, there being a separate coin mechanism for each set of shelves. Coin action, multiple-coin.-The lever f is provided with an adjustable counterweight h, the position of which determines the number of coins that must be inserted In the case of three-halfpenny articles, the penny is held up by spaced indiarubber pieces n disposed below the coin slot, and is pushed through when the halfpenny is inserted, the halfpenny falling through the bifurcated end f<1> of the coin lever,
Patent GB-1505712-A (GB)
Title: Method of synthesizing a musical sound
IPC: G10H1/043
Filed: 1975-03-14
Abstract: 1505712 Electrophonic musical instruments LELAND STANFORD JUNIOR UNIVERSITY BOARD OF TRUSTEES OF 14 March 1975 [26 March 1974] 10725/75 Heading G5J A method of synthetizing musical sounds, particularly transient musical sounds comprises the steps of frequency modulating an audio frequency carrier wave by an audio frequency modulation wave, and transducing the resultant frequency-modulated wave. The degree of frequency modulation and hence the sound spectrum of the resultant wave is controlled by a modulation index function which varies with time during the playing of a sound. Preferably two audio-frequency carrier waves are frequency modulated each by a respective audio frequency wave according to a respective modulation index function to generate the resultant wave. The resultant wave is amplitude modulated to give attack, sustain and decay portions thereto before voicing thereof. Apparatus for effecting the method is described, Fig. 5.
Patent GB-662665-A (GB)
Title: Improvements in or relating to combinations of electric relays and circuits embodying such combinations
IPC: H03K23/74
Filed: 1949-04-22
Abstract: 662,665. Impulse counters. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. April 22, 1949 [April 26, 1948], No. 10743/49. Class 40 (iv). [Also in Group XIX] An element for use in binary counting or subtraction comprises a relay with opposed windings and an auxiliary relay, the element resuming normal condition after two impulses. The first impulse closes contact i to energize winding A1 of relay A, relay B pulling up when contact i breaks. The second impulse energizes winding A2 which opposes winding A1 so that A releases, B falling back at the end of the impulse. By replacing the contact i by a press-button, the device may be used in consultation telephony where an instrument connected to an exchange line can be changed over to call-back by pressing the button twice. A number of elements may be arranged in a counting chain, even impulses passing over terminal I to the next element in the chain. Fig. 4 shows such a chain used for counting on the binary principle, while if contacts o are reversed, the chain is used for subtraction after the first pulse has energized all counting relays A, C, E, G as well as auxiliary relays B, D, F, H. In Fig. 6, telephone digits are registered on several sets of register relays such as la, 2a, 4a, 8a. Closing the loop energizes relay I to operate slow-release relay V1. A train of impulses then vibrates contact i to operate the chain of counting relays A, C, E, G in the manner described above, slow-release relay K also pulling up to energize slow-release relay V2. At the end of the train of impulses, K falls back, followed by V2, but in this interval, the registration on the counting chain A, C, E, G is transferred over leads 1, 2, 4, 8 to the first register relays 1a, 2a, 4a, 8a. Release of V2 restores the counting chain while registration of the digit energizes change over relay 01 to transfer the leads 1, 2, 4, 8 to the next set of register relays.
Patent GB-261264-A (GB)
Title: Improvements in typewriting machines
IPC: B41J29/02
Filed: 1926-04-23
Abstract: 261,264. Hess, E. B., and Royal Typewriter Co., Inc. April 23, 1926. Type-lever machines; portable machines, - A mask or cover for attachment to the framework of a typewriter consists of a lower portion encasing the sides, rear, and extreme front, and an upper portion provided with housings for the ink-ribbon spools. In the mask for a portable typewriter shown in the Figure, the upper portion consists of two sheet-metal members 1, 2 connected by a flanged plate 8 and a curved part 10 serving as a dust shield for the action. The members 1, 2 are each formed with sides 3, 4 and a top 5 which lies slightly above and partly surrounds one of the ink-ribbon spools. The lower portion consists of a sheet-metal member having sides 11 and a front 12, and an attached plate 17 having parts 19 for covering the mechanism at the rear of the typewriter. The front and the sides are formed with a bottom flange 14 and a rolled edge 13, and the sides have flanges 16 for attachment to the members 1, 2. The mask is secured to the framework by means of screws passing through openings 22, 23. The pivots of the type-levers may be shielded from dust by means of curved or inclined tapering plates 24 secured to the segment. The tops 5 of the members 1, 2 serve as hand-rests when making erasures.
Patent GB-1346437-A (GB)
Title: Process for the manufacture of free-wheels for starter motors
IPC: F16D41/00
Filed: 1971-04-22
Abstract: 1346437 Making starter motor freewheels; brazing FABRICA ESPANOLA MAGNETOS SA 22 April 1971 [2 May 1970] 10805/71 Headings B3A and B3R A method of making a starter motor freewheel comprises assembling a plurality of internally toothed sheet steel rings 4 coaxially with a circular metal base member 1, the rings being enclosed within and located with respect to the base member by an annular metal shell 2, and soldering the base member, rings and shell together. The annular end portion 2A of the shell is reinforced with a ring 8. Each ring is provided with holes (7) Fig. 1 (not shown), and the rings are aligned by passing dowel pins 5 through the holes. A copper ring 3 is located in a groove in the base member 1 and an edge 6 of the shell 2 is bent around a chamfered peripheral edge of the member 1. The soldering operation is then carried out in a reducing atmosphere at a temperature of about 1120‹ C.
Patent GB-498449-A (GB)
Title: Improvements in or relating to seat and table arrangements for dining cars, restaurants and the like
IPC: B61D37/00
Filed: 1938-04-08
Abstract: 498,449. Rail, road, and other vehicles ; restaurants. BUDD MANUFACTURING CO., E. G. April 8, 1938, No. 10813. Convention date, April 8, 1937. [Classes 103 (iv) and 108 (i)] [Also in Group X] A table and seating arrangement for a long, narrow compartment such as the dining-car of a railway train, or in an aircraft or restaurant comprises a number of fixed tables 4, preferably hinged to the wall 1 of the car &c. adjacent to the windows 2, and each having straight edges 4b extending from the car &c. wall and a curved edge 4c adjacent to a central aisle, a number of fixed seats 5 arranged in pairs alongside the walls with their backs 5a secured together or formed integrally, and a number of movable seats 6, two or three of which may be positioned around the curved edge 4c of each table.
Patent GB-809022-A (GB)
Title: Improvements relating to vehicles with endless chain conveyor floors
IPC: B60P1/38
Filed: 1955-04-15
Abstract: 809,022. Vehicles equipped with endless conveyer floors. MASSEY-HARRIS-FERGUSON Inc. April 15, 1955 [May 7, 1954], No. 10852/55. Classes 78 (1) and 78 (4). An endless conveyer moving over the floor of a vehicle is driven by a ratchet wheel 25 driven by a pawl 26 which engages the ratchet wheel over a driving angle determined by the position of a sleeve 33 carried by an adjustable arm 37. In the construction illustrated the arm 37 pivots on a shaft 9 carrying the ratchet wheel 25 and the tail sprockets 7 for a pair of laterally spaced chains 4 which are joined by slats to form the vehicle floor. The arm 37 is held by a spring-biased pawl 41 which engages any of three notches 38, 39, 40 in any of three positions in which, respectively, the pawl 26 is effective over the pitch of two ratchet teeth, the pitch of one ratchet tooth, and totally ineffective. A spring-biased pawl 30 prevents reverse rotation. The ratchet lever 27 carrying the pawl 26 is operated by a connecting rod 24 connected to a crank (not shown) on a lateral shaft mounted at the front of the trailer and driven, through a torque-limiting clutch, from the power take-off of a tractor.